n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 10 |
6 | 20 |
7 | 47 |
8 | 128 |
9 | 340 |
10 | 868 |
11 | 2275 |
12 | 6188 |
13 | 16922 |
14 | 46112 |
15 | 126613 |
16 | 351568 |
17 | 981622 |
18 | 2747876 |
19 | 7723250 |
20 | 21811856 |
21 | 61828886 |
22 | 175752728 |
23 | 500984606 |
24 | 1432111244 |
25 | 4104175970 |
26 | 11787811340 |
27 | 33926475162 |
28 | 97837209036 |
29 | 282662156478 |
30 | 818022923184 |
31 | 2371103693427 |
[1,1,1,1,4,10,20,47,128,340,868,2275,6188,16922, 46112,126613,351568,981622,2747876,7723250, 21811856,61828886,175752728,500984606,1432111244, 4104175970,11787811340,33926475162,97837209036, 282662156478,818022923184,2371103693427] |